This program allows zooming in to the Mandelbrot Set, which is a fractal. Here is an interactive version and the Processing source code. Download Processing here or edit and run the code in-browser here.
Controls:
Left click - Zoom in
Right click - Zoom out
Left arrow - Decrement number of iterations
Right arrow - Increment number of iterations
R - Return to original position
Controls:
Left click - Zoom in
Right click - Zoom out
Left arrow - Decrement number of iterations
Right arrow - Increment number of iterations
R - Return to original position